Great looking pole building. I like the vinyl siding over the osb. I'll bet the TC-18 really likes living in the lap of luxury.
Question about your solar pool heater. Is that a home-built unit or one purchased from a pool supply house. I have an above-ground 27' round pool and have built a home-grown solar heater. Basically, a 4x8 ft sheet of 3/4 plywood painted flat blace, with 200 ft of black rubber hose coiled on the surface, with 1/4' plexiglass creating a clear cover for the whole thing. It's connected by garden hoses to the filter and has it's own return hose dumping into the pool. Works fine, but I'm always looking for better ideas.
Bob Pence